Electromagnetic Scattering by a Metallic Disk.
Abstract
The scattering of electromagnetic waves by finite obstacles can be rigorously found for only two cases, the sphere and the disk. There exist two exact solutions to the scattering of an electromagnetic plane wave by a circular metallic disk. Flammer's and Meixner's exact approaches are successively considered and compared. In both cases, the fields are expanded in spheroidal vector wave functions, and the scattered field is uniquely determined by the boundary conditions on the surface of the disk and the edge condition. The purpose of this work is to find a solution valid everywhere; in particular, it is desired to obtain the surface current and near fields. A numerical test of the bistatic scattered far-field for normal incidence is presented. Problems encountered in Flammer's solution for arbitrary incidence are pointed out. The general form of the scattered field is derived from Meixner's vector potentials. This formulation is appropriate for near-field calculations. Another proof of Meixner's solution using dependence relations of the spheroidal vector wave functions is given. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1979
- Accession Number
- ADA080441
Entities
People
- Daniel B. Hodge
- Didier P. Mithouard
Organizations
- Ohio State University